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About Bushranger

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  1. Bushranger

    Metallurgy: Old fire escape tubes.

    You still do not seem to get it. Those fire escape tunnels were only used a short time...then abandoned within a year as they lost function (slipperiness)...they are not what is used in modern times. As for, "...going there and taking a sample.", I would need a time machine because the school(s) and the Aluminum (or stainless steel tubes) have been gone for about 50 years or so. "...examine in mass spectrometer..." If I had a sample, I would not need to pull a mass spectrometer out of my butt ...all I would need is a Oxyacteline torch. Aluminum melts at about 1200 degrees...way before reaching Red heat, where as steels melt at about 2700 degrees (Red heat). You knowledge of metals seems to be theoretical rather than practical. It seems the mystery remains...but, if my theory (the formation of Aluminum Oxide), holds, they were constructed of Aluminum, not stainless steel(s), and were an example of not understanding the properties or requirements when choosing a material.
  2. Bushranger

    Metallurgy: Old fire escape tubes.

    You missed a couple of important details. My question pertained to the escape tubes that replaced steel stairway fire escapes in the fifties...you can tell by the cars in the picture that it was not modern times. The link you provided and your comment pertain to modern escape tubes which are not relevant to my question.
  3. The thread is about I.Q.s and/or intelligence required to enter the military and/or become a doctor. Your post, which may or may not be true, seemingly has deviated from the issues and become (in your mind), become a psychological and a moral issue.
  4. Although I was in the military in the early sixties, and certain jobs had higher I.Q. requirements, I don't know why that would have changed. Therefore, not all jobs (MOS's) in the military would be open to hose with "weaker I.Q.'s". Also, what do you mean by a "normal iq"? 100 is average. If you have a high I.Q. (130 or higher), and you associated with persons with 100 (or thereabouts) I.Q.'s you would become aware (vocabulary, intestes, etc.) that a person with a 100 is not all that intelligent. When it comes to scientists and such as medical doctors, a person with a "normal" I.Q. (i.e., 100) is unlikely to achieve such. For instance, look at the bottom entires on this chart: https://www.quora.com/What-are-good-jobs-for-people-with-a-90-98-IQ-Am-I-hopeless
  5. Nevertheless, from the perspective of the Army using an I.Q. test to qualify persons to enter Officer Candidate School, it would be a purely pragmatic way of doing so in that they do not want the blind, those who cannot read/write English nor those who have not used a pen (actually a number 2 pencil), before.
  6. Bushranger

    Metallurgy: Old fire escape tubes.

    Michigan. All the fire escapes were switched out to the tube types in all the schools in my home town of Ludington, MI. They all stopped working shortly after they were installed. At first we shot through them at a dangerous speed...a teacher would stand about eight feet away from the opening and grab the kids to keep them from falling. They got slower and slower until the kids had to "scoot" down them using their feet to descend. You can see the tube in the photo I have attached. That is a plicture of my grade school in the fifties, "Pere Marquette School", in Ludington, Mi.
  7. When I was a kid, there was a big move to replace steel fire escape open stairs on schools with a metal tube-slide. They worked fine for awhile, but all to shortly, they lost their slipperiness, would not longer work as a slide...kids would get stuck, therefore they lost their function and were abandoned. As an adult who learned about metallurgy, I attributed the loss of function to the fact that they were constructed from Aluminum and once the protective wax (an assumption it was a wax), wore off, the Aluminum quickly formed its Oxide resulting in a microscopic layer of Aluminum Oxide... which is an abrasive due to the sharp crystalline edges. However, someone claims that the tubes were not Aluminum, but were Stainless Steel. I have performed internet searches to find what metal they were made of, with negative results. Can anyone attest as to which metal they were actually made of?
  8. Bushranger

    Speed of submerged submarine

    Your answer does not make sense to me. If a big portion of the hull is out of the water, its design is moot as to slowing it down in air.
  9. Bushranger

    Speed of submerged submarine

    WWII era subs used diesels on the surface and attained faster speeds than when switched to electric motors while submerged. However, modern atomic powered subs attain higher speeds while travelling submerged than on the surface. This seems counterintuitive in that more of the hull is in contact with the water and therefore more friction with the water than when on the surface. So my question is, how/by what mechanism do submerged submarines travel at higher speeds than while on the surface?
  10. I doubt if medical schools administer an I.Q. test, in that how well a person performed in undergrad school would be a more useful predictor of how well they would be expected to perform in medical school. However, at one time (I do not know if they still do), the U.S. Army administered a General Technical test (A.K.A., and I.Q. test) and it was used to qualify or disqualify certain advanced individual training (AIT) schools, and as I posted earlier, that score was used to qualify/disqualify recruits for Officer Candidate School (OCS)...I know that from my personal experience in the Army, albeit a long, long time ago. Some jobs (Military Occupational Specialty, "MOS") were menial and did not require a great deal of intelligence. Other MOSs were considered to require more intelligence. The GT scores were more or less the exact score as when a person was scored on an I.Q.test. People may want to dance around with what I.Q. tests were invented for and what they really measure and what other measures are more legitimate, but in regard to the original poster's question, the truth of the matter is the Army did use I.Q. tests and it would require more than an "average" I.Q. Non Sequitur.
  11. I.Q. test scores are the accepted default measure of intelligence in our society. The "average" I.Q. is 100 points. I was in the the position to get to know people and then look at their I.Q. scores in their records. A person with an average (100 points), was pretty much a dullard who would not likely be able to pass chemistry (inorganic and organic), anatomy, physiology, psychology, along "wiMathematics required for a doctor are college algebra, trigonometry, calculus, linear algebra, statistics & probility.th: " The 100 I.Q. people I knew would only be able to handle arithmetic. A dentist is a doctor...a doctor of dentistry (DDS).
  12. This begs the question: How intelligent does a person have to be to become a doctor? Please define "stupid". The word is used primarily as an insult and is ambiguous. What I.Q. score do you think a person would have to have to successfully negotiate all the classes that are required for a doctoral degree in medicine?
  13. At one time (early sixties when I joined the army), you were given a General Technical (GT) test. It was essentially an I.Q. test. It was used to qualify enlisted men as to what jobs and or training they would qualify for. For instance in order to become a Neuro-psychiatric Technician, one had to have a minimum GT score of 120 (if I remember correctly). Likewise, those of us who scored high enough were interviewed about attending Officer Candidate School (OCS), with the intention of becoming an officer. I do not remember how high a score was required for OCS, but when they told me that I would have to lengthen my enlistment from 3 years to 6 years, I opted out. People with an I.Q. score of 100 are considered of average intelligence...90 would be considered mentally handicapped. Even an I.Q. score of 100 is not all that high. I would assume, but only guessing on this based on my experiences, that to become a medical doctor, due to the rigorous college science classes, I would estimate a minimum of an I.Q. score of 135 (considered gifted), would likely be required to master the requisite curriculum.
  14. Bushranger

    Origin of the domestic dog.

    Yes, I understand that the domestic dog is descended from the grey wolf. What seems counter intuitive is the close resemblance of the African Hunting Dog to the domestic dog given the more distant connection. My instincts tell me that they should not look so much alike. So much for my instincts. I was hoping for some recent DNA studies of the Hunting Dogs.
  15. I grew up (pre-DNA knowledge), when scientists claimed that the domestic dog was a direct descendant of the grey wolf. However, at the same time, they were sure that the Giant Panda was as was also the Red Panda, more closely related to Raccoons that Bears. However, as I understand it, DNA has how shown that Giant and Red Pandas are not related but that Red Pandas are related to Raccoons (as thought even previous to DNA) but the Giant Pandas are related to Bears. Which brings me to dogs. Given that the African Hunting Dog, AKA, Painted Dog resembles the domestic dog way more than it seems the Grey Wolf does, has there been any DNA studies confirming that the Domestic Dog indeed evolved directly from the Grey Wolf and that the African Hunting Dog had a different acesstor and is not really a "dog" at all?